html {
    background: #eee;
}

.title h1 {
    text-align: center;
}

a {
    color: #000;
    text-decoration: none;
}

.main {
    max-width: 960px;
    background: #fff;
    margin: 1em auto 0;
    padding-top: 1em;
    padding-bottom: 1em;
    border: solid #fff;
    border-width: 0 2em;
}

.content p {
    word-break: break-all;
    text-indent: 2em;
    line-height: 2;
    margin: 0 0 0;
}

.end p {
    text-align: right;
}

.footer, .github {
    padding-top: 1em;
    padding-bottom: 1em;
    text-align: center;
}

.github a {
    background: #000;
    color: #fff;
    text-decoration: none;
    font-family: arial, sans-serif;
    text-align: center;
    font-weight: bold;
    padding: 5px 40px;
    font-size: 1rem;
    line-height: 2rem;
    position: relative;
    transition: 0.5s;
}

.github a:hover {
    background: #c11;
    color: #fff;
}

.github a::before, .github a::after {
    content: "";
    width: 100%;
    display: block;
    position: absolute;
    top: 1px;
    left: 0;
    height: 1px;
    background: #fff;
}

.github a::after {
    bottom: 1px;
    top: auto;
}

@media screen and (min-width: 800px) {
    .github {
        position: fixed;
        display: block;
        top: 0;
        right: 0;
        width: 200px;
        overflow: hidden;
        height: 200px;
        z-index: 9999;
    }

    .github a {
        width: 200px;
        position: absolute;
        top: 60px;
        right: -60px;
        transform: rotate(45deg);
        -webkit-transform: rotate(45deg);
        -ms-transform: rotate(45deg);
        -moz-transform: rotate(45deg);
        -o-transform: rotate(45deg);
        box-shadow: 4px 4px 10px rgba(0, 0, 0, 0.8);
    }
}